pad.c revision 1.25.2.2
1 /* $NetBSD: pad.c,v 1.25.2.2 2016/07/18 11:25:07 pgoyette Exp $ */ 2 3 /*- 4 * Copyright (c) 2007 Jared D. McNeill <jmcneill (at) invisible.ca> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __KERNEL_RCSID(0, "$NetBSD: pad.c,v 1.25.2.2 2016/07/18 11:25:07 pgoyette Exp $"); 31 32 #include <sys/types.h> 33 #include <sys/param.h> 34 #include <sys/conf.h> 35 #include <sys/buf.h> 36 #include <sys/kmem.h> 37 #include <sys/kernel.h> 38 #include <sys/device.h> 39 #include <sys/proc.h> 40 #include <sys/condvar.h> 41 #include <sys/select.h> 42 #include <sys/audioio.h> 43 #include <sys/vnode.h> 44 #include <sys/module.h> 45 #include <sys/atomic.h> 46 #include <sys/time.h> 47 #include <sys/localcount.h> 48 49 #include <dev/audio_if.h> 50 #include <dev/audiovar.h> 51 #include <dev/auconv.h> 52 #include <dev/auvolconv.h> 53 54 #include <dev/pad/padvar.h> 55 56 #define PADUNIT(x) minor(x) 57 58 extern struct cfdriver pad_cd; 59 60 typedef struct pad_block { 61 uint8_t *pb_ptr; 62 int pb_len; 63 } pad_block_t; 64 65 enum { 66 PAD_OUTPUT_CLASS, 67 PAD_INPUT_CLASS, 68 PAD_OUTPUT_MASTER_VOLUME, 69 PAD_INPUT_DAC_VOLUME, 70 PAD_ENUM_LAST, 71 }; 72 73 static int pad_match(device_t, cfdata_t, void *); 74 static void pad_attach(device_t, device_t, void *); 75 static int pad_detach(device_t, int); 76 static void pad_childdet(device_t, device_t); 77 78 static int pad_query_encoding(void *, struct audio_encoding *); 79 static int pad_set_params(void *, int, int, 80 audio_params_t *, audio_params_t *, 81 stream_filter_list_t *, stream_filter_list_t *); 82 static int pad_start_output(void *, void *, int, 83 void (*)(void *), void *); 84 static int pad_start_input(void *, void *, int, 85 void (*)(void *), void *); 86 static int pad_halt_output(void *); 87 static int pad_halt_input(void *); 88 static int pad_getdev(void *, struct audio_device *); 89 static int pad_set_port(void *, mixer_ctrl_t *); 90 static int pad_get_port(void *, mixer_ctrl_t *); 91 static int pad_query_devinfo(void *, mixer_devinfo_t *); 92 static int pad_get_props(void *); 93 static int pad_round_blocksize(void *, int, int, const audio_params_t *); 94 static void pad_get_locks(void *, kmutex_t **, kmutex_t **); 95 96 static stream_filter_t *pad_swvol_filter_le(struct audio_softc *, 97 const audio_params_t *, const audio_params_t *); 98 static stream_filter_t *pad_swvol_filter_be(struct audio_softc *, 99 const audio_params_t *, const audio_params_t *); 100 static void pad_swvol_dtor(stream_filter_t *); 101 102 static const struct audio_hw_if pad_hw_if = { 103 .query_encoding = pad_query_encoding, 104 .set_params = pad_set_params, 105 .start_output = pad_start_output, 106 .start_input = pad_start_input, 107 .halt_output = pad_halt_output, 108 .halt_input = pad_halt_input, 109 .getdev = pad_getdev, 110 .set_port = pad_set_port, 111 .get_port = pad_get_port, 112 .query_devinfo = pad_query_devinfo, 113 .get_props = pad_get_props, 114 .round_blocksize = pad_round_blocksize, 115 .get_locks = pad_get_locks, 116 }; 117 118 #define PAD_NFORMATS 1 119 static const struct audio_format pad_formats[PAD_NFORMATS] = { 120 { NULL, AUMODE_PLAY|AUMODE_RECORD, AUDIO_ENCODING_SLINEAR_LE, 16, 16, 121 2, AUFMT_STEREO, 1, { 44100 } }, 122 }; 123 124 extern void padattach(int); 125 126 static int pad_add_block(pad_softc_t *, uint8_t *, int); 127 static int pad_get_block(pad_softc_t *, pad_block_t *, int); 128 129 dev_type_open(pad_open); 130 dev_type_close(pad_close); 131 dev_type_read(pad_read); 132 133 #ifdef _MODULE 134 struct localcount pad_localcount; 135 #endif 136 137 const struct cdevsw pad_cdevsw = { 138 .d_open = pad_open, 139 .d_close = pad_close, 140 .d_read = pad_read, 141 .d_write = nowrite, 142 .d_ioctl = noioctl, 143 .d_stop = nostop, 144 .d_tty = notty, 145 .d_poll = nopoll, 146 .d_mmap = nommap, 147 .d_kqfilter = nokqfilter, 148 .d_discard = nodiscard, 149 #ifdef _MODULE 150 .d_localcount = &pad_localcount, 151 #endif 152 .d_flag = D_OTHER | D_MPSAFE, 153 }; 154 155 CFATTACH_DECL2_NEW(pad, sizeof(pad_softc_t), pad_match, pad_attach, pad_detach, 156 NULL, NULL, pad_childdet); 157 158 void 159 padattach(int n) 160 { 161 int i, err; 162 cfdata_t cf; 163 164 aprint_debug("pad: requested %d units\n", n); 165 166 err = config_cfattach_attach(pad_cd.cd_name, &pad_ca); 167 if (err) { 168 aprint_error("%s: couldn't register cfattach: %d\n", 169 pad_cd.cd_name, err); 170 config_cfdriver_detach(&pad_cd); 171 return; 172 } 173 174 for (i = 0; i < n; i++) { 175 cf = kmem_alloc(sizeof(struct cfdata), KM_SLEEP); 176 if (cf == NULL) { 177 aprint_error("%s: couldn't allocate cfdata\n", 178 pad_cd.cd_name); 179 continue; 180 } 181 cf->cf_name = pad_cd.cd_name; 182 cf->cf_atname = pad_cd.cd_name; 183 cf->cf_unit = i; 184 cf->cf_fstate = FSTATE_STAR; 185 186 (void)config_attach_pseudo(cf); 187 } 188 189 return; 190 } 191 192 static int 193 pad_add_block(pad_softc_t *sc, uint8_t *blk, int blksize) 194 { 195 int l; 196 197 if (sc->sc_open == 0) 198 return EIO; 199 200 KASSERT(mutex_owned(&sc->sc_lock)); 201 202 if (sc->sc_buflen + blksize > PAD_BUFSIZE) 203 return ENOBUFS; 204 205 if (sc->sc_wpos + blksize <= PAD_BUFSIZE) 206 memcpy(sc->sc_audiobuf + sc->sc_wpos, blk, blksize); 207 else { 208 l = PAD_BUFSIZE - sc->sc_wpos; 209 memcpy(sc->sc_audiobuf + sc->sc_wpos, blk, l); 210 memcpy(sc->sc_audiobuf, blk + l, blksize - l); 211 } 212 213 sc->sc_wpos += blksize; 214 if (sc->sc_wpos > PAD_BUFSIZE) 215 sc->sc_wpos -= PAD_BUFSIZE; 216 217 sc->sc_buflen += blksize; 218 219 return 0; 220 } 221 222 static int 223 pad_get_block(pad_softc_t *sc, pad_block_t *pb, int blksize) 224 { 225 int l; 226 227 KASSERT(mutex_owned(&sc->sc_lock)); 228 KASSERT(pb != NULL); 229 230 if (sc->sc_buflen < blksize) 231 return ERESTART; 232 233 pb->pb_ptr = (sc->sc_audiobuf + sc->sc_rpos); 234 if (sc->sc_rpos + blksize < PAD_BUFSIZE) { 235 pb->pb_len = blksize; 236 sc->sc_rpos += blksize; 237 } else { 238 l = PAD_BUFSIZE - sc->sc_rpos; 239 pb->pb_len = l; 240 sc->sc_rpos = 0; 241 } 242 sc->sc_buflen -= pb->pb_len; 243 244 return 0; 245 } 246 247 static int 248 pad_match(device_t parent, cfdata_t data, void *opaque) 249 { 250 251 return 1; 252 } 253 254 static void 255 pad_childdet(device_t self, device_t child) 256 { 257 pad_softc_t *sc = device_private(self); 258 259 sc->sc_audiodev = NULL; 260 } 261 262 static void 263 pad_attach(device_t parent, device_t self, void *opaque) 264 { 265 pad_softc_t *sc = device_private(self); 266 267 aprint_normal_dev(self, "outputs: 44100Hz, 16-bit, stereo\n"); 268 269 sc->sc_dev = self; 270 sc->sc_open = 0; 271 if (auconv_create_encodings(pad_formats, PAD_NFORMATS, 272 &sc->sc_encodings) != 0) { 273 aprint_error_dev(self, "couldn't create encodings\n"); 274 return; 275 } 276 277 cv_init(&sc->sc_condvar, device_xname(self)); 278 mutex_init(&sc->sc_lock, MUTEX_DEFAULT, IPL_NONE); 279 mutex_init(&sc->sc_intr_lock, MUTEX_DEFAULT, IPL_NONE); 280 281 sc->sc_swvol = 255; 282 sc->sc_buflen = 0; 283 sc->sc_rpos = sc->sc_wpos = 0; 284 sc->sc_audiodev = (void *)audio_attach_mi(&pad_hw_if, sc, sc->sc_dev); 285 286 if (!pmf_device_register(self, NULL, NULL)) 287 aprint_error_dev(self, "couldn't establish power handler\n"); 288 289 return; 290 } 291 292 static int 293 pad_detach(device_t self, int flags) 294 { 295 pad_softc_t *sc = device_private(self); 296 int cmaj, mn, rc; 297 298 cmaj = cdevsw_lookup_major(&pad_cdevsw); 299 mn = device_unit(self); 300 vdevgone(cmaj, mn, mn, VCHR); 301 302 if ((rc = config_detach_children(self, flags)) != 0) 303 return rc; 304 305 pmf_device_deregister(self); 306 307 mutex_destroy(&sc->sc_lock); 308 mutex_destroy(&sc->sc_intr_lock); 309 cv_destroy(&sc->sc_condvar); 310 311 auconv_delete_encodings(sc->sc_encodings); 312 313 return 0; 314 } 315 316 int 317 pad_open(dev_t dev, int flags, int fmt, struct lwp *l) 318 { 319 pad_softc_t *sc; 320 321 sc = device_lookup_private(&pad_cd, PADUNIT(dev)); 322 if (sc == NULL) 323 return ENXIO; 324 325 if (atomic_swap_uint(&sc->sc_open, 1) != 0) { 326 return EBUSY; 327 } 328 329 getmicrotime(&sc->sc_last); 330 sc->sc_bytes_count = 0; 331 332 return 0; 333 } 334 335 int 336 pad_close(dev_t dev, int flags, int fmt, struct lwp *l) 337 { 338 pad_softc_t *sc; 339 340 sc = device_lookup_private(&pad_cd, PADUNIT(dev)); 341 if (sc == NULL) 342 return ENXIO; 343 344 KASSERT(sc->sc_open > 0); 345 sc->sc_open = 0; 346 347 return 0; 348 } 349 350 #define PAD_BYTES_PER_SEC (44100 * sizeof(int16_t) * 2) 351 #define TIMENEXTREAD (20 * 1000) 352 #define BYTESTOSLEEP (PAD_BYTES_PER_SEC / (1000000 / TIMENEXTREAD)) 353 354 int 355 pad_read(dev_t dev, struct uio *uio, int flags) 356 { 357 struct timeval now; 358 uint64_t nowusec, lastusec; 359 pad_softc_t *sc; 360 pad_block_t pb; 361 void (*intr)(void *); 362 void *intrarg; 363 int err, wait_ticks; 364 365 sc = device_lookup_private(&pad_cd, PADUNIT(dev)); 366 if (sc == NULL) 367 return ENXIO; 368 369 err = 0; 370 371 mutex_enter(&sc->sc_lock); 372 intr = sc->sc_intr; 373 intrarg = sc->sc_intrarg; 374 375 while (uio->uio_resid > 0 && !err) { 376 getmicrotime(&now); 377 nowusec = (now.tv_sec * 1000000) + now.tv_usec; 378 lastusec = (sc->sc_last.tv_sec * 1000000) + 379 sc->sc_last.tv_usec; 380 if (lastusec + TIMENEXTREAD > nowusec && 381 sc->sc_bytes_count >= BYTESTOSLEEP) { 382 wait_ticks = (hz * ((lastusec + TIMENEXTREAD) - 383 nowusec)) / 1000000; 384 if (wait_ticks > 0) { 385 kpause("padwait", TRUE, wait_ticks, 386 &sc->sc_lock); 387 } 388 389 sc->sc_bytes_count -= BYTESTOSLEEP; 390 getmicrotime(&sc->sc_last); 391 } else if (sc->sc_bytes_count >= BYTESTOSLEEP) { 392 sc->sc_bytes_count -= BYTESTOSLEEP; 393 getmicrotime(&sc->sc_last); 394 } else if (lastusec + TIMENEXTREAD <= nowusec) 395 getmicrotime(&sc->sc_last); 396 397 err = pad_get_block(sc, &pb, min(uio->uio_resid, PAD_BLKSIZE)); 398 if (!err) { 399 sc->sc_bytes_count += pb.pb_len; 400 401 mutex_exit(&sc->sc_lock); 402 err = uiomove(pb.pb_ptr, pb.pb_len, uio); 403 mutex_enter(&sc->sc_lock); 404 continue; 405 } 406 407 if (intr) { 408 mutex_enter(&sc->sc_intr_lock); 409 kpreempt_disable(); 410 (*intr)(intrarg); 411 kpreempt_enable(); 412 mutex_exit(&sc->sc_intr_lock); 413 intr = sc->sc_intr; 414 intrarg = sc->sc_intrarg; 415 err = 0; 416 continue; 417 } 418 err = cv_wait_sig(&sc->sc_condvar, &sc->sc_lock); 419 if (err != 0) 420 break; 421 422 intr = sc->sc_intr; 423 intrarg = sc->sc_intrarg; 424 } 425 mutex_exit(&sc->sc_lock); 426 427 return err; 428 } 429 430 static int 431 pad_query_encoding(void *opaque, struct audio_encoding *ae) 432 { 433 pad_softc_t *sc; 434 435 sc = (pad_softc_t *)opaque; 436 437 KASSERT(mutex_owned(&sc->sc_lock)); 438 439 return auconv_query_encoding(sc->sc_encodings, ae); 440 } 441 442 static int 443 pad_set_params(void *opaque, int setmode, int usemode, 444 audio_params_t *play, audio_params_t *rec, 445 stream_filter_list_t *pfil, stream_filter_list_t *rfil) 446 { 447 pad_softc_t *sc __diagused; 448 449 sc = (pad_softc_t *)opaque; 450 451 KASSERT(mutex_owned(&sc->sc_lock)); 452 453 if (auconv_set_converter(pad_formats, PAD_NFORMATS, AUMODE_PLAY, 454 play, true, pfil) < 0) 455 return EINVAL; 456 if (auconv_set_converter(pad_formats, PAD_NFORMATS, AUMODE_RECORD, 457 rec, true, rfil) < 0) 458 return EINVAL; 459 460 if (pfil->req_size > 0) 461 play = &pfil->filters[0].param; 462 switch (play->encoding) { 463 case AUDIO_ENCODING_SLINEAR_LE: 464 if (play->precision == 16 && play->validbits == 16) 465 pfil->prepend(pfil, pad_swvol_filter_le, play); 466 break; 467 case AUDIO_ENCODING_SLINEAR_BE: 468 if (play->precision == 16 && play->validbits == 16) 469 pfil->prepend(pfil, pad_swvol_filter_be, play); 470 break; 471 default: 472 break; 473 } 474 475 return 0; 476 } 477 478 static int 479 pad_start_output(void *opaque, void *block, int blksize, 480 void (*intr)(void *), void *intrarg) 481 { 482 pad_softc_t *sc; 483 int err; 484 485 sc = (pad_softc_t *)opaque; 486 487 KASSERT(mutex_owned(&sc->sc_lock)); 488 489 sc->sc_intr = intr; 490 sc->sc_intrarg = intrarg; 491 sc->sc_blksize = blksize; 492 493 err = pad_add_block(sc, block, blksize); 494 495 cv_broadcast(&sc->sc_condvar); 496 497 return err; 498 } 499 500 static int 501 pad_start_input(void *opaque, void *block, int blksize, 502 void (*intr)(void *), void *intrarg) 503 { 504 pad_softc_t *sc __diagused; 505 506 sc = (pad_softc_t *)opaque; 507 508 KASSERT(mutex_owned(&sc->sc_lock)); 509 510 return EOPNOTSUPP; 511 } 512 513 static int 514 pad_halt_output(void *opaque) 515 { 516 pad_softc_t *sc; 517 518 sc = (pad_softc_t *)opaque; 519 520 KASSERT(mutex_owned(&sc->sc_lock)); 521 522 sc->sc_intr = NULL; 523 sc->sc_intrarg = NULL; 524 sc->sc_buflen = 0; 525 sc->sc_rpos = sc->sc_wpos = 0; 526 527 return 0; 528 } 529 530 static int 531 pad_halt_input(void *opaque) 532 { 533 pad_softc_t *sc __diagused; 534 535 sc = (pad_softc_t *)opaque; 536 537 KASSERT(mutex_owned(&sc->sc_lock)); 538 539 return 0; 540 } 541 542 static int 543 pad_getdev(void *opaque, struct audio_device *ret) 544 { 545 strlcpy(ret->name, "Virtual Audio", sizeof(ret->name)); 546 strlcpy(ret->version, osrelease, sizeof(ret->version)); 547 strlcpy(ret->config, "pad", sizeof(ret->config)); 548 549 return 0; 550 } 551 552 static int 553 pad_set_port(void *opaque, mixer_ctrl_t *mc) 554 { 555 pad_softc_t *sc; 556 557 sc = (pad_softc_t *)opaque; 558 559 KASSERT(mutex_owned(&sc->sc_lock)); 560 561 switch (mc->dev) { 562 case PAD_OUTPUT_MASTER_VOLUME: 563 case PAD_INPUT_DAC_VOLUME: 564 sc->sc_swvol = mc->un.value.level[AUDIO_MIXER_LEVEL_MONO]; 565 return 0; 566 } 567 568 return ENXIO; 569 } 570 571 static int 572 pad_get_port(void *opaque, mixer_ctrl_t *mc) 573 { 574 pad_softc_t *sc; 575 576 sc = (pad_softc_t *)opaque; 577 578 KASSERT(mutex_owned(&sc->sc_lock)); 579 580 switch (mc->dev) { 581 case PAD_OUTPUT_MASTER_VOLUME: 582 case PAD_INPUT_DAC_VOLUME: 583 mc->un.value.level[AUDIO_MIXER_LEVEL_MONO] = sc->sc_swvol; 584 return 0; 585 } 586 587 return ENXIO; 588 } 589 590 static int 591 pad_query_devinfo(void *opaque, mixer_devinfo_t *di) 592 { 593 pad_softc_t *sc __diagused; 594 595 sc = (pad_softc_t *)opaque; 596 597 KASSERT(mutex_owned(&sc->sc_lock)); 598 599 switch (di->index) { 600 case PAD_OUTPUT_CLASS: 601 di->mixer_class = PAD_OUTPUT_CLASS; 602 strcpy(di->label.name, AudioCoutputs); 603 di->type = AUDIO_MIXER_CLASS; 604 di->next = di->prev = AUDIO_MIXER_LAST; 605 return 0; 606 case PAD_INPUT_CLASS: 607 di->mixer_class = PAD_INPUT_CLASS; 608 strcpy(di->label.name, AudioCinputs); 609 di->type = AUDIO_MIXER_CLASS; 610 di->next = di->prev = AUDIO_MIXER_LAST; 611 return 0; 612 case PAD_OUTPUT_MASTER_VOLUME: 613 di->mixer_class = PAD_OUTPUT_CLASS; 614 strcpy(di->label.name, AudioNmaster); 615 di->type = AUDIO_MIXER_VALUE; 616 di->next = di->prev = AUDIO_MIXER_LAST; 617 di->un.v.num_channels = 1; 618 strcpy(di->un.v.units.name, AudioNvolume); 619 return 0; 620 case PAD_INPUT_DAC_VOLUME: 621 di->mixer_class = PAD_INPUT_CLASS; 622 strcpy(di->label.name, AudioNdac); 623 di->type = AUDIO_MIXER_VALUE; 624 di->next = di->prev = AUDIO_MIXER_LAST; 625 di->un.v.num_channels = 1; 626 strcpy(di->un.v.units.name, AudioNvolume); 627 return 0; 628 } 629 630 return ENXIO; 631 } 632 633 static int 634 pad_get_props(void *opaque) 635 { 636 pad_softc_t *sc __diagused; 637 638 sc = (pad_softc_t *)opaque; 639 640 KASSERT(mutex_owned(&sc->sc_lock)); 641 642 return 0; 643 } 644 645 static int 646 pad_round_blocksize(void *opaque, int blksize, int mode, 647 const audio_params_t *p) 648 { 649 pad_softc_t *sc __diagused; 650 651 sc = (pad_softc_t *)opaque; 652 KASSERT(mutex_owned(&sc->sc_lock)); 653 654 return PAD_BLKSIZE; 655 } 656 657 static void 658 pad_get_locks(void *opaque, kmutex_t **intr, kmutex_t **thread) 659 { 660 pad_softc_t *sc; 661 662 sc = (pad_softc_t *)opaque; 663 664 *intr = &sc->sc_intr_lock; 665 *thread = &sc->sc_lock; 666 } 667 668 static stream_filter_t * 669 pad_swvol_filter_le(struct audio_softc *asc, 670 const audio_params_t *from, const audio_params_t *to) 671 { 672 auvolconv_filter_t *this; 673 device_t dev = audio_get_device(asc); 674 struct pad_softc *sc = device_private(dev); 675 676 this = kmem_alloc(sizeof(auvolconv_filter_t), KM_SLEEP); 677 this->base.base.fetch_to = auvolconv_slinear16_le_fetch_to; 678 this->base.dtor = pad_swvol_dtor; 679 this->base.set_fetcher = stream_filter_set_fetcher; 680 this->base.set_inputbuffer = stream_filter_set_inputbuffer; 681 this->vol = &sc->sc_swvol; 682 683 return (stream_filter_t *)this; 684 } 685 686 static stream_filter_t * 687 pad_swvol_filter_be(struct audio_softc *asc, 688 const audio_params_t *from, const audio_params_t *to) 689 { 690 auvolconv_filter_t *this; 691 device_t dev = audio_get_device(asc); 692 struct pad_softc *sc = device_private(dev); 693 694 this = kmem_alloc(sizeof(auvolconv_filter_t), KM_SLEEP); 695 this->base.base.fetch_to = auvolconv_slinear16_be_fetch_to; 696 this->base.dtor = pad_swvol_dtor; 697 this->base.set_fetcher = stream_filter_set_fetcher; 698 this->base.set_inputbuffer = stream_filter_set_inputbuffer; 699 this->vol = &sc->sc_swvol; 700 701 return (stream_filter_t *)this; 702 } 703 704 static void 705 pad_swvol_dtor(stream_filter_t *this) 706 { 707 if (this) 708 kmem_free(this, sizeof(auvolconv_filter_t)); 709 } 710 711 #ifdef _MODULE 712 713 MODULE(MODULE_CLASS_DRIVER, pad, NULL); 714 715 static const struct cfiattrdata audiobuscf_iattrdata = { 716 "audiobus", 0, { { NULL, NULL, 0 }, } 717 }; 718 static const struct cfiattrdata * const pad_attrs[] = { 719 &audiobuscf_iattrdata, NULL 720 }; 721 722 CFDRIVER_DECL(pad, DV_DULL, pad_attrs); 723 extern struct cfattach pad_ca; 724 static int padloc[] = { -1, -1 }; 725 726 static struct cfdata pad_cfdata[] = { 727 { 728 .cf_name = "pad", 729 .cf_atname = "pad", 730 .cf_unit = 0, 731 .cf_fstate = FSTATE_STAR, 732 .cf_loc = padloc, 733 .cf_flags = 0, 734 .cf_pspec = NULL, 735 }, 736 { NULL, NULL, 0, 0, NULL, 0, NULL } 737 }; 738 739 static int 740 pad_modcmd(modcmd_t cmd, void *arg) 741 { 742 devmajor_t cmajor = NODEVMAJOR, bmajor = NODEVMAJOR; 743 int error; 744 745 switch (cmd) { 746 case MODULE_CMD_INIT: 747 error = config_cfdriver_attach(&pad_cd); 748 if (error) { 749 return error; 750 } 751 752 error = config_cfattach_attach(pad_cd.cd_name, &pad_ca); 753 if (error) { 754 config_cfdriver_detach(&pad_cd); 755 aprint_error("%s: unable to register cfattach\n", 756 pad_cd.cd_name); 757 758 return error; 759 } 760 761 error = config_cfdata_attach(pad_cfdata, 1); 762 if (error) { 763 config_cfattach_detach(pad_cd.cd_name, &pad_ca); 764 config_cfdriver_detach(&pad_cd); 765 aprint_error("%s: unable to register cfdata\n", 766 pad_cd.cd_name); 767 768 return error; 769 } 770 771 error = devsw_attach(pad_cd.cd_name, NULL, &bmajor, 772 &pad_cdevsw, &cmajor); 773 if (error) { 774 error = config_cfdata_detach(pad_cfdata); 775 if (error) { 776 return error; 777 } 778 config_cfattach_detach(pad_cd.cd_name, &pad_ca); 779 config_cfdriver_detach(&pad_cd); 780 aprint_error("%s: unable to register devsw\n", 781 pad_cd.cd_name); 782 783 return error; 784 } 785 786 (void)config_attach_pseudo(pad_cfdata); 787 788 return 0; 789 case MODULE_CMD_FINI: 790 error = config_cfdata_detach(pad_cfdata); 791 if (error) { 792 return error; 793 } 794 795 config_cfattach_detach(pad_cd.cd_name, &pad_ca); 796 config_cfdriver_detach(&pad_cd); 797 devsw_detach(NULL, &pad_cdevsw); 798 799 return 0; 800 default: 801 return ENOTTY; 802 } 803 } 804 805 #endif 806
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